Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) $ in Millions					3 Months Ended
	Sep. 27, 2021 contention	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Mar. 31, 2023	Apr. 20, 2023 USD ($)	Aug. 05, 2022 USD ($)
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Comment period (in days)		60 days
Number of contentions | contention	3
Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station | Nuclear Regulatory Commission | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
Operating license (in years)			80 years	60 years
Storm Cost Securitization Legislation | PSCSC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Deferred storm costs							$ 223
Storm Cost Securitization Legislation | PSCSC | Duke Energy Progress | Subsequent event
Public Utilities, General Disclosures [Line Items]
Deferred storm costs						$ 171